drivers/isdn/hisax/elsa_ser.c

   1 /* $Id: elsa_ser.c,v 2.14.2.3 2004/02/11 13:21:33 keil Exp $
   2  *
   3  * stuff for the serial modem on ELSA cards
   4  *
   5  * This software may be used and distributed according to the terms
   6  * of the GNU General Public License, incorporated herein by reference.
   7  *
   8  */
   9
  10 #include <linux/serial.h>
  11 #include <linux/serial_reg.h>
  12
  13 #define MAX_MODEM_BUF   256
  14 #define WAKEUP_CHARS    (MAX_MODEM_BUF/2)
  15 #define RS_ISR_PASS_LIMIT 256
  16 #define BASE_BAUD ( 1843200 / 16 )
  17
  18 //#define SERIAL_DEBUG_OPEN 1
  19 //#define SERIAL_DEBUG_INTR 1
  20 //#define SERIAL_DEBUG_FLOW 1
  21 #undef SERIAL_DEBUG_OPEN
  22 #undef SERIAL_DEBUG_INTR
  23 #undef SERIAL_DEBUG_FLOW
  24 #undef SERIAL_DEBUG_REG
  25 //#define SERIAL_DEBUG_REG 1
  26
  27 #ifdef SERIAL_DEBUG_REG
  28 static u_char deb[32];
  29 const char *ModemIn[] = {"RBR","IER","IIR","LCR","MCR","LSR","MSR","SCR"};
  30 const char *ModemOut[] = {"THR","IER","FCR","LCR","MCR","LSR","MSR","SCR"};
  31 #endif
  32
  33 static char *MInit_1 = "AT&F&C1E0&D2\r\0";
  34 static char *MInit_2 = "ATL2M1S64=13\r\0";
  35 static char *MInit_3 = "AT+FCLASS=0\r\0";
  36 static char *MInit_4 = "ATV1S2=128X1\r\0";
  37 static char *MInit_5 = "AT\\V8\\N3\r\0";
  38 static char *MInit_6 = "ATL0M0&G0%E1\r\0";
  39 static char *MInit_7 = "AT%L1%M0%C3\r\0";
  40
  41 static char *MInit_speed28800 = "AT%G0%B28800\r\0";
  42
  43 static char *MInit_dialout = "ATs7=60 x1 d\r\0";
  44 static char *MInit_dialin = "ATs7=60 x1 a\r\0";
  45
  46
  47 static inline unsigned int serial_in(struct IsdnCardState *cs, int offset)
  48 {
  49 #ifdef SERIAL_DEBUG_REG
  50         u_int val = inb(cs->hw.elsa.base + 8 + offset);
  51         debugl1(cs,"in   %s %02x",ModemIn[offset], val);
  52         return(val);
  53 #else
  54         return inb(cs->hw.elsa.base + 8 + offset);
  55 #endif
  56 }
  57
  58 static inline unsigned int serial_inp(struct IsdnCardState *cs, int offset)
  59 {
  60 #ifdef SERIAL_DEBUG_REG
  61 #ifdef ELSA_SERIAL_NOPAUSE_IO
  62         u_int val = inb(cs->hw.elsa.base + 8 + offset);
  63         debugl1(cs,"inp  %s %02x",ModemIn[offset], val);
  64 #else
  65         u_int val = inb_p(cs->hw.elsa.base + 8 + offset);
  66         debugl1(cs,"inP  %s %02x",ModemIn[offset], val);
  67 #endif
  68         return(val);
  69 #else
  70 #ifdef ELSA_SERIAL_NOPAUSE_IO
  71         return inb(cs->hw.elsa.base + 8 + offset);
  72 #else
  73         return inb_p(cs->hw.elsa.base + 8 + offset);
  74 #endif
  75 #endif
  76 }
  77
  78 static inline void serial_out(struct IsdnCardState *cs, int offset, int value)
  79 {
  80 #ifdef SERIAL_DEBUG_REG
  81         debugl1(cs,"out  %s %02x",ModemOut[offset], value);
  82 #endif
  83         outb(value, cs->hw.elsa.base + 8 + offset);
  84 }
  85
  86 static inline void serial_outp(struct IsdnCardState *cs, int offset,
  87                                int value)
  88 {
  89 #ifdef SERIAL_DEBUG_REG
  90 #ifdef ELSA_SERIAL_NOPAUSE_IO
  91         debugl1(cs,"outp %s %02x",ModemOut[offset], value);
  92 #else
  93         debugl1(cs,"outP %s %02x",ModemOut[offset], value);
  94 #endif
  95 #endif
  96 #ifdef ELSA_SERIAL_NOPAUSE_IO
  97         outb(value, cs->hw.elsa.base + 8 + offset);
  98 #else
  99         outb_p(value, cs->hw.elsa.base + 8 + offset);
 100 #endif
 101 }
 102
 103 /*
 104  * This routine is called to set the UART divisor registers to match
 105  * the specified baud rate for a serial port.
 106  */
 107 static void change_speed(struct IsdnCardState *cs, int baud)
 108 {
 109         int     quot = 0, baud_base;
 110         unsigned cval, fcr = 0;
 111         int     bits;
 112
 113
 114         /* byte size and parity */
 115         cval = 0x03; bits = 10;
 116         /* Determine divisor based on baud rate */
 117         baud_base = BASE_BAUD;
 118         quot = baud_base / baud;
 119         /* If the quotient is ever zero, default to 9600 bps */
 120         if (!quot)
 121                 quot = baud_base / 9600;
 122
 123         /* Set up FIFO's */
 124         if ((baud_base / quot) < 2400)
 125                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
 126         else
 127                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
 128         serial_outp(cs, UART_FCR, fcr);
 129         /* CTS flow control flag and modem status interrupts */
 130         cs->hw.elsa.IER &= ~UART_IER_MSI;
 131         cs->hw.elsa.IER |= UART_IER_MSI;
 132         serial_outp(cs, UART_IER, cs->hw.elsa.IER);
 133
 134         debugl1(cs,"modem quot=0x%x", quot);
 135         serial_outp(cs, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
 136         serial_outp(cs, UART_DLL, quot & 0xff);         /* LS of divisor */
 137         serial_outp(cs, UART_DLM, quot >> 8);           /* MS of divisor */
 138         serial_outp(cs, UART_LCR, cval);                /* reset DLAB */
 139         serial_inp(cs, UART_RX);
 140 }
 141
 142 static int mstartup(struct IsdnCardState *cs)
 143 {
 144         int     retval=0;
 145
 146         /*
 147          * Clear the FIFO buffers and disable them
 148          * (they will be reenabled in change_speed())
 149          */
 150         serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
 151
 152         /*
 153          * At this point there's no way the LSR could still be 0xFF;
 154          * if it is, then bail out, because there's likely no UART
 155          * here.
 156          */
 157         if (serial_inp(cs, UART_LSR) == 0xff) {
 158                 retval = -ENODEV;
 159                 goto errout;
 160         }
 161
 162         /*
 163          * Clear the interrupt registers.
 164          */
 165         (void) serial_inp(cs, UART_RX);
 166         (void) serial_inp(cs, UART_IIR);
 167         (void) serial_inp(cs, UART_MSR);
 168
 169         /*
 170          * Now, initialize the UART
 171          */
 172         serial_outp(cs, UART_LCR, UART_LCR_WLEN8);      /* reset DLAB */
 173
 174         cs->hw.elsa.MCR = 0;
 175         cs->hw.elsa.MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
 176         serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
 177
 178         /*
 179          * Finally, enable interrupts
 180          */
 181         cs->hw.elsa.IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 182         serial_outp(cs, UART_IER, cs->hw.elsa.IER);     /* enable interrupts */
 183
 184         /*
 185          * And clear the interrupt registers again for luck.
 186          */
 187         (void)serial_inp(cs, UART_LSR);
 188         (void)serial_inp(cs, UART_RX);
 189         (void)serial_inp(cs, UART_IIR);
 190         (void)serial_inp(cs, UART_MSR);
 191
 192         cs->hw.elsa.transcnt = cs->hw.elsa.transp = 0;
 193         cs->hw.elsa.rcvcnt = cs->hw.elsa.rcvp =0;
 194
 195         /*
 196          * and set the speed of the serial port
 197          */
 198         change_speed(cs, BASE_BAUD);
 199         cs->hw.elsa.MFlag = 1;
 200 errout:
 201         return retval;
 202 }
 203
 204 /*
 205  * This routine will shutdown a serial port; interrupts are disabled, and
 206  * DTR is dropped if the hangup on close termio flag is on.
 207  */
 208 static void mshutdown(struct IsdnCardState *cs)
 209 {
 210
 211 #ifdef SERIAL_DEBUG_OPEN
 212         printk(KERN_DEBUG"Shutting down serial ....");
 213 #endif
 214
 215         /*
 216          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 217          * here so the queue might never be waken up
 218          */
 219
 220         cs->hw.elsa.IER = 0;
 221         serial_outp(cs, UART_IER, 0x00);        /* disable all intrs */
 222         cs->hw.elsa.MCR &= ~UART_MCR_OUT2;
 223
 224         /* disable break condition */
 225         serial_outp(cs, UART_LCR, serial_inp(cs, UART_LCR) & ~UART_LCR_SBC);
 226
 227         cs->hw.elsa.MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
 228         serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
 229
 230         /* disable FIFO's */
 231         serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
 232         serial_inp(cs, UART_RX);    /* read data port to reset things */
 233
 234 #ifdef SERIAL_DEBUG_OPEN
 235         printk(" done\n");
 236 #endif
 237 }
 238
 239 static inline int
 240 write_modem(struct BCState *bcs) {
 241         int ret=0;
 242         struct IsdnCardState *cs = bcs->cs;
 243         int count, len, fp;
 244
 245         if (!bcs->tx_skb)
 246                 return 0;
 247         if (bcs->tx_skb->len <= 0)
 248                 return 0;
 249         len = bcs->tx_skb->len;
 250         if (len > MAX_MODEM_BUF - cs->hw.elsa.transcnt)
 251                 len = MAX_MODEM_BUF - cs->hw.elsa.transcnt;
 252         fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
 253         fp &= (MAX_MODEM_BUF -1);
 254         count = len;
 255         if (count > MAX_MODEM_BUF - fp) {
 256                 count = MAX_MODEM_BUF - fp;
 257                 memcpy(cs->hw.elsa.transbuf + fp, bcs->tx_skb->data, count);
 258                 skb_pull(bcs->tx_skb, count);
 259                 cs->hw.elsa.transcnt += count;
 260                 ret = count;
 261                 count = len - count;
 262                 fp = 0;
 263         }
 264         memcpy((cs->hw.elsa.transbuf + fp), bcs->tx_skb->data, count);
 265         skb_pull(bcs->tx_skb, count);
 266         cs->hw.elsa.transcnt += count;
 267         ret += count;
 268
 269         if (cs->hw.elsa.transcnt &&
 270             !(cs->hw.elsa.IER & UART_IER_THRI)) {
 271                         cs->hw.elsa.IER |= UART_IER_THRI;
 272                 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
 273         }
 274         return(ret);
 275 }
 276
 277 static inline void
 278 modem_fill(struct BCState *bcs) {
 279
 280         if (bcs->tx_skb) {
 281                 if (bcs->tx_skb->len) {
 282                         write_modem(bcs);
 283                         return;
 284                 } else {
 285                         if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
 286                                 (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
 287                                 u_long  flags;
 288                                 spin_lock_irqsave(&bcs->aclock, flags);
 289                                 bcs->ackcnt += bcs->hw.hscx.count;
 290                                 spin_unlock_irqrestore(&bcs->aclock, flags);
 291                                 schedule_event(bcs, B_ACKPENDING);
 292                         }
 293                         dev_kfree_skb_any(bcs->tx_skb);
 294                         bcs->tx_skb = NULL;
 295                 }
 296         }
 297         if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
 298                 bcs->hw.hscx.count = 0;
 299                 test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 300                 write_modem(bcs);
 301         } else {
 302                 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 303                 schedule_event(bcs, B_XMTBUFREADY);
 304         }
 305 }
 306
 307 static inline void receive_chars(struct IsdnCardState *cs,
 308                                  int *status)
 309 {
 310         unsigned char ch;
 311         struct sk_buff *skb;
 312
 313         do {
 314                 ch = serial_in(cs, UART_RX);
 315                 if (cs->hw.elsa.rcvcnt >= MAX_MODEM_BUF)
 316                         break;
 317                 cs->hw.elsa.rcvbuf[cs->hw.elsa.rcvcnt++] = ch;
 318 #ifdef SERIAL_DEBUG_INTR
 319                 printk("DR%02x:%02x...", ch, *status);
 320 #endif
 321                 if (*status & (UART_LSR_BI | UART_LSR_PE |
 322                                UART_LSR_FE | UART_LSR_OE)) {
 323
 324 #ifdef SERIAL_DEBUG_INTR
 325                         printk("handling exept....");
 326 #endif
 327                 }
 328                 *status = serial_inp(cs, UART_LSR);
 329         } while (*status & UART_LSR_DR);
 330         if (cs->hw.elsa.MFlag == 2) {
 331                 if (!(skb = dev_alloc_skb(cs->hw.elsa.rcvcnt)))
 332                         printk(KERN_WARNING "ElsaSER: receive out of memory\n");
 333                 else {
 334                         memcpy(skb_put(skb, cs->hw.elsa.rcvcnt), cs->hw.elsa.rcvbuf,
 335                                 cs->hw.elsa.rcvcnt);
 336                         skb_queue_tail(& cs->hw.elsa.bcs->rqueue, skb);
 337                 }
 338                 schedule_event(cs->hw.elsa.bcs, B_RCVBUFREADY);
 339         } else {
 340                 char tmp[128];
 341                 char *t = tmp;
 342
 343                 t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
 344                 QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
 345                 debugl1(cs, tmp);
 346         }
 347         cs->hw.elsa.rcvcnt = 0;
 348 }
 349
 350 static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
 351 {
 352         int count;
 353
 354         debugl1(cs, "transmit_chars: p(%x) cnt(%x)", cs->hw.elsa.transp,
 355                 cs->hw.elsa.transcnt);
 356
 357         if (cs->hw.elsa.transcnt <= 0) {
 358                 cs->hw.elsa.IER &= ~UART_IER_THRI;
 359                 serial_out(cs, UART_IER, cs->hw.elsa.IER);
 360                 return;
 361         }
 362         count = 16;
 363         do {
 364                 serial_outp(cs, UART_TX, cs->hw.elsa.transbuf[cs->hw.elsa.transp++]);
 365                 if (cs->hw.elsa.transp >= MAX_MODEM_BUF)
 366                         cs->hw.elsa.transp=0;
 367                 if (--cs->hw.elsa.transcnt <= 0)
 368                         break;
 369         } while (--count > 0);
 370         if ((cs->hw.elsa.transcnt < WAKEUP_CHARS) && (cs->hw.elsa.MFlag==2))
 371                 modem_fill(cs->hw.elsa.bcs);
 372
 373 #ifdef SERIAL_DEBUG_INTR
 374         printk("THRE...");
 375 #endif
 376         if (intr_done)
 377                 *intr_done = 0;
 378         if (cs->hw.elsa.transcnt <= 0) {
 379                 cs->hw.elsa.IER &= ~UART_IER_THRI;
 380                 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
 381         }
 382 }
 383
 384
 385 static void rs_interrupt_elsa(int irq, struct IsdnCardState *cs)
 386 {
 387         int status, iir, msr;
 388         int pass_counter = 0;
 389
 390 #ifdef SERIAL_DEBUG_INTR
 391         printk("rs_interrupt_single(%d)...", irq);
 392 #endif
 393
 394         do {
 395                 status = serial_inp(cs, UART_LSR);
 396                 debugl1(cs,"rs LSR %02x", status);
 397 #ifdef SERIAL_DEBUG_INTR
 398                 printk("status = %x...", status);
 399 #endif
 400                 if (status & UART_LSR_DR)
 401                         receive_chars(cs, &status);
 402                 if (status & UART_LSR_THRE)
 403                         transmit_chars(cs, NULL);
 404                 if (pass_counter++ > RS_ISR_PASS_LIMIT) {
 405                         printk("rs_single loop break.\n");
 406                         break;
 407                 }
 408                 iir = serial_inp(cs, UART_IIR);
 409                 debugl1(cs,"rs IIR %02x", iir);
 410                 if ((iir & 0xf) == 0) {
 411                         msr = serial_inp(cs, UART_MSR);
 412                         debugl1(cs,"rs MSR %02x", msr);
 413                 }
 414         } while (!(iir & UART_IIR_NO_INT));
 415 #ifdef SERIAL_DEBUG_INTR
 416         printk("end.\n");
 417 #endif
 418 }
 419
 420 extern int open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs);
 421 extern void modehscx(struct BCState *bcs, int mode, int bc);
 422 extern void hscx_l2l1(struct PStack *st, int pr, void *arg);
 423
 424 static void
 425 close_elsastate(struct BCState *bcs)
 426 {
 427         modehscx(bcs, 0, bcs->channel);
 428         if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
 429                 if (bcs->hw.hscx.rcvbuf) {
 430                         if (bcs->mode != L1_MODE_MODEM)
 431                                 kfree(bcs->hw.hscx.rcvbuf);
 432                         bcs->hw.hscx.rcvbuf = NULL;
 433                 }
 434                 skb_queue_purge(&bcs->rqueue);
 435                 skb_queue_purge(&bcs->squeue);
 436                 if (bcs->tx_skb) {
 437                         dev_kfree_skb_any(bcs->tx_skb);
 438                         bcs->tx_skb = NULL;
 439                         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 440                 }
 441         }
 442 }
 443
 444 static void
 445 modem_write_cmd(struct IsdnCardState *cs, u_char *buf, int len) {
 446         int count, fp;
 447         u_char *msg = buf;
 448
 449         if (!len)
 450                 return;
 451         if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
 452                 return;
 453         }
 454         fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
 455         fp &= (MAX_MODEM_BUF -1);
 456         count = len;
 457         if (count > MAX_MODEM_BUF - fp) {
 458                 count = MAX_MODEM_BUF - fp;
 459                 memcpy(cs->hw.elsa.transbuf + fp, msg, count);
 460                 cs->hw.elsa.transcnt += count;
 461                 msg += count;
 462                 count = len - count;
 463                 fp = 0;
 464         }
 465         memcpy(cs->hw.elsa.transbuf + fp, msg, count);
 466         cs->hw.elsa.transcnt += count;
 467         if (cs->hw.elsa.transcnt &&
 468             !(cs->hw.elsa.IER & UART_IER_THRI)) {
 469                 cs->hw.elsa.IER |= UART_IER_THRI;
 470                 serial_outp(cs, UART_IER, cs->hw.elsa.IER);
 471         }
 472 }
 473
 474 static void
 475 modem_set_init(struct IsdnCardState *cs) {
 476         int timeout;
 477
 478 #define RCV_DELAY 20000
 479         modem_write_cmd(cs, MInit_1, strlen(MInit_1));
 480         timeout = 1000;
 481         while(timeout-- && cs->hw.elsa.transcnt)
 482                 udelay(1000);
 483         debugl1(cs, "msi tout=%d", timeout);
 484         udelay(RCV_DELAY);
 485         modem_write_cmd(cs, MInit_2, strlen(MInit_2));
 486         timeout = 1000;
 487         while(timeout-- && cs->hw.elsa.transcnt)
 488                 udelay(1000);
 489         debugl1(cs, "msi tout=%d", timeout);
 490         udelay(RCV_DELAY);
 491         modem_write_cmd(cs, MInit_3, strlen(MInit_3));
 492         timeout = 1000;
 493         while(timeout-- && cs->hw.elsa.transcnt)
 494                 udelay(1000);
 495         debugl1(cs, "msi tout=%d", timeout);
 496         udelay(RCV_DELAY);
 497         modem_write_cmd(cs, MInit_4, strlen(MInit_4));
 498         timeout = 1000;
 499         while(timeout-- && cs->hw.elsa.transcnt)
 500                 udelay(1000);
 501         debugl1(cs, "msi tout=%d", timeout);
 502         udelay(RCV_DELAY );
 503         modem_write_cmd(cs, MInit_5, strlen(MInit_5));
 504         timeout = 1000;
 505         while(timeout-- && cs->hw.elsa.transcnt)
 506                 udelay(1000);
 507         debugl1(cs, "msi tout=%d", timeout);
 508         udelay(RCV_DELAY);
 509         modem_write_cmd(cs, MInit_6, strlen(MInit_6));
 510         timeout = 1000;
 511         while(timeout-- && cs->hw.elsa.transcnt)
 512                 udelay(1000);
 513         debugl1(cs, "msi tout=%d", timeout);
 514         udelay(RCV_DELAY);
 515         modem_write_cmd(cs, MInit_7, strlen(MInit_7));
 516         timeout = 1000;
 517         while(timeout-- && cs->hw.elsa.transcnt)
 518                 udelay(1000);
 519         debugl1(cs, "msi tout=%d", timeout);
 520         udelay(RCV_DELAY);
 521 }
 522
 523 static void
 524 modem_set_dial(struct IsdnCardState *cs, int outgoing) {
 525         int timeout;
 526 #define RCV_DELAY 20000
 527
 528         modem_write_cmd(cs, MInit_speed28800, strlen(MInit_speed28800));
 529         timeout = 1000;
 530         while(timeout-- && cs->hw.elsa.transcnt)
 531                 udelay(1000);
 532         debugl1(cs, "msi tout=%d", timeout);
 533         udelay(RCV_DELAY);
 534         if (outgoing)
 535                 modem_write_cmd(cs, MInit_dialout, strlen(MInit_dialout));
 536         else
 537                 modem_write_cmd(cs, MInit_dialin, strlen(MInit_dialin));
 538         timeout = 1000;
 539         while(timeout-- && cs->hw.elsa.transcnt)
 540                 udelay(1000);
 541         debugl1(cs, "msi tout=%d", timeout);
 542         udelay(RCV_DELAY);
 543 }
 544
 545 static void
 546 modem_l2l1(struct PStack *st, int pr, void *arg)
 547 {
 548         struct BCState *bcs = st->l1.bcs;
 549         struct sk_buff *skb = arg;
 550         u_long flags;
 551
 552         if (pr == (PH_DATA | REQUEST)) {
 553                 spin_lock_irqsave(&bcs->cs->lock, flags);
 554                 if (bcs->tx_skb) {
 555                         skb_queue_tail(&bcs->squeue, skb);
 556                 } else {
 557                         bcs->tx_skb = skb;
 558                         test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 559                         bcs->hw.hscx.count = 0;
 560                         write_modem(bcs);
 561                 }
 562                 spin_unlock_irqrestore(&bcs->cs->lock, flags);
 563         } else if (pr == (PH_ACTIVATE | REQUEST)) {
 564                 test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
 565                 st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
 566                 set_arcofi(bcs->cs, st->l1.bc);
 567                 mstartup(bcs->cs);
 568                 modem_set_dial(bcs->cs, test_bit(FLG_ORIG, &st->l2.flag));
 569                 bcs->cs->hw.elsa.MFlag=2;
 570         } else if (pr == (PH_DEACTIVATE | REQUEST)) {
 571                 test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
 572                 bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
 573                 arcofi_fsm(bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
 574                 interruptible_sleep_on(&bcs->cs->dc.isac.arcofi_wait);
 575                 bcs->cs->hw.elsa.MFlag=1;
 576         } else {
 577                 printk(KERN_WARNING"ElsaSer: unknown pr %x\n", pr);
 578         }
 579 }
 580
 581 static int
 582 setstack_elsa(struct PStack *st, struct BCState *bcs)
 583 {
 584
 585         bcs->channel = st->l1.bc;
 586         switch (st->l1.mode) {
 587                 case L1_MODE_HDLC:
 588                 case L1_MODE_TRANS:
 589                         if (open_hscxstate(st->l1.hardware, bcs))
 590                                 return (-1);
 591                         st->l2.l2l1 = hscx_l2l1;
 592                         break;
 593                 case L1_MODE_MODEM:
 594                         bcs->mode = L1_MODE_MODEM;
 595                         if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
 596                                 bcs->hw.hscx.rcvbuf = bcs->cs->hw.elsa.rcvbuf;
 597                                 skb_queue_head_init(&bcs->rqueue);
 598                                 skb_queue_head_init(&bcs->squeue);
 599                         }
 600                         bcs->tx_skb = NULL;
 601                         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 602                         bcs->event = 0;
 603                         bcs->hw.hscx.rcvidx = 0;
 604                         bcs->tx_cnt = 0;
 605                         bcs->cs->hw.elsa.bcs = bcs;
 606                         st->l2.l2l1 = modem_l2l1;
 607                         break;
 608         }
 609         st->l1.bcs = bcs;
 610         setstack_manager(st);
 611         bcs->st = st;
 612         setstack_l1_B(st);
 613         return (0);
 614 }
 615
 616 static void
 617 init_modem(struct IsdnCardState *cs) {
 618
 619         cs->bcs[0].BC_SetStack = setstack_elsa;
 620         cs->bcs[1].BC_SetStack = setstack_elsa;
 621         cs->bcs[0].BC_Close = close_elsastate;
 622         cs->bcs[1].BC_Close = close_elsastate;
 623         if (!(cs->hw.elsa.rcvbuf = kmalloc(MAX_MODEM_BUF,
 624                 GFP_ATOMIC))) {
 625                 printk(KERN_WARNING
 626                         "Elsa: No modem mem hw.elsa.rcvbuf\n");
 627                 return;
 628         }
 629         if (!(cs->hw.elsa.transbuf = kmalloc(MAX_MODEM_BUF,
 630                 GFP_ATOMIC))) {
 631                 printk(KERN_WARNING
 632                         "Elsa: No modem mem hw.elsa.transbuf\n");
 633                 kfree(cs->hw.elsa.rcvbuf);
 634                 cs->hw.elsa.rcvbuf = NULL;
 635                 return;
 636         }
 637         if (mstartup(cs)) {
 638                 printk(KERN_WARNING "Elsa: problem startup modem\n");
 639         }
 640         modem_set_init(cs);
 641 }
 642
 643 static void
 644 release_modem(struct IsdnCardState *cs) {
 645
 646         cs->hw.elsa.MFlag = 0;
 647         if (cs->hw.elsa.transbuf) {
 648                 if (cs->hw.elsa.rcvbuf) {
 649                         mshutdown(cs);
 650                         kfree(cs->hw.elsa.rcvbuf);
 651                         cs->hw.elsa.rcvbuf = NULL;
 652                 }
 653                 kfree(cs->hw.elsa.transbuf);
 654                 cs->hw.elsa.transbuf = NULL;
 655         }
 656 }